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When you say thr impellers are in two pieces and the vanes are gone, does this mean the front and back shroud are still relatively whole with the rear (upper)shroud still connected to the shaft,or have the impellers come apart through the hub (nice section view)? What size bowls are they and...

A couple of things come to mind. The caps on a vfd tend to be quite intolerant of ripple on the dc bus beyond the design point. Have a look at the incoming supply and dc bus on scope. Usually ripple should be less than 13-10% depending on manuf. Does the drive have an integral input reactor...

If you are looking for garden variety carbon steel in either hex socket or square head styles, I've had good luck with my local acklands.We use square head jacking screws frequently and they seem to be on the shelf up to 1"NC. Call 306 664 5534. ( Saskatoon tech ) 7/8" x 1.5 socket head p/n...

Just my two cents. If this unit is in fact an axial flow pump (vertical propeller pump) then a rise in BHP is normal with a reduction in capacity from BEP as stated already. Though often this rise will exceed the driver rating, breaking shafts makes me suspect other issues. If this is a mixed...

Good afternoon. I can't say that I have ever seen a 1/2 hp 4" 4 pole sub motor but I do know that hitachi among others produces 4 pole motors in 6" sizes and up. I think the lower end of the range is 3 or 5 hp though. These are available in an oil filled or water filled version and are very...

Hi to all I've just registered here to reply to this post. I have seen many spline failures in 4,6 & 8" submersible motors which were caused by a lack of lubrication at the time of coupling the wet end (pump) to the motor. Both franklin and grundfoss reccomend lubricating the splines. If it is...